Picatinny ‘Scope’ Mounting

[Roebuck]

I was just watching a video about where you place the scope ring recoil bar in the rail ,forward or back .Although the consensus says forward , I always place it resting against the back of the groove.Always have done.Have a look of this short video.Thanks .

 

[wytonpjs]

Thanks for posting that @Roebuck

I am a CEng (first degree in Mechanical Engineering) and "loosely" a WOME specialist. I was totally in the mount-forward camp however, there's nothing like an empirical test to objectively prove the facts!

Having very recently juggled scopes on 2 rifles and yet to re-zero, I'm going to mount backwards from now on!

Thank-you

 

[Klenchblaize]

One thing I've noticed with a lot of scope installations on a rail is how many end up with the rings positioned all but perfectly aligned with where a conventional set of fixed scope bases would be attached!

Point being that unless you do have need for greater scope forward/rearward positioning for correct eye relief or swap scopes regularly, why not enjoy unobstructed loading port access and a mounting arrangement with zero potential for scope creep unless it moves in the rings?

K

 

[FISH BOY]

Damn it - I’ve always been in the march back camp until recently following advice on here - I rezeroed all my rifles forward.

Have to say there was bugger all in the difference in zero - maybe a couple of clicks.

As he notes, if it’s torqued up correctly there should be no real drama.

 

[The Singing Stalker]

Wouldn’t happen with a Blaser.

 

[wytonpjs]

Wouldn’t happen with a Blaser.

@The Singing Stalker and Blaser - there's 2 names I wouldn't associate

 

[farmer_giles]

Or a Creedmoor... DRFC

I've not been able to generate a measurable difference when testing this one way or the other, albeit when using a single-piece QR mount (ADM).

 

[The Singing Stalker]

@The Singing Stalker and Blaser - there's 2 names I wouldn't associate

Shhh, I have 2. All because I’m cack handed. I know they are marmite, but I Absolutely love them. My only issue is, no mag as mine are R93's. First world problems.
Both have been restocked. Unlikely to ever sell until I give up stalking…… or something super shiny turns up, cheap, and I can get a variation in. Too much effort.

 

[Tugmanade]

Years ago it was a nightmare trying to stop the scope creeping backwards on a HW80, not sure if it makes any difference being a springer air rifle or not, some scope rings had a recess to put a pin in that went into a hole on the rifle to stop it creeping backwards. After experiencing this I was always surprised that almost everyone said push the scope forward then tighten

 

[BLUEROLL]

Surely if there is any doubt it would be a good idea to position the front ring (assuming two piece rings) forward in the rail slot and the rear ring to the back of the rail slot.

 

[takbok]

Forward for me. Nothing about that video convinces me otherwise.

Recoil impulse occurs over a very short time involving large forces.

The deceleration occurs over a longer time which means the forces (on the scope, in opposite direction) are lower.

 

[jonnah]

I thought Optilock bases on Sako rifles are designed to tighten in the forward direction with the effect of recoil ,do not know how it applies to scope movement.

 

[HonestJohn]

He’s full of Shiite. It marched backwards because it set the rings so light they bounced off the front lug.

 

[Klenchblaize]

Its an understandable assertion, given a rifle recoils into one's shoulder.

K

 

[VSS]

A scope will always try to move forward as the rifle recoils.
Therefore the recoil lug/bar should be pushed as hard forward as possible when mounting a scope.

 

[Long drag]

I was in the forward camp, until talking to a fellow who was adminted it was back.

It made sense to me at the time and I've stuck with it.

 

[Dalua]

A scope will always try to move forward as the rifle recoils.

I though the 'scope will always try to stay where it is while the rifle recoils?

The result is the same, though - push the mounts so they make contact forrard before tightening.

 

[Klenchblaize]

Never had to worry as all my mounts & rings exhibit exemplary conetrol over recoil from any direction!

K

 

[Donkey Basher]

Thanks for posting that @Roebuck

I am a CEng (first degree in Mechanical Engineering) and "loosely" a WOME specialist. I was totally in the mount-forward camp however, there's nothing like an empirical test to objectively prove the facts!

Having very recently juggled scopes on 2 rifles and yet to re-zero, I'm going to mount backwards from now on!

Thank-you

And that is nothing like an empirical test!

If that good ol’ boy is right, why do rifle manufacturers put the recoil slots for mounts at the back not the front or have a taper that widens going forwards so the mounts tighten on recoil not come lose!

Maybe they just don’t understand physics - or more likely he doesn’t!

 

[MilesW]

Years ago it was a nightmare trying to stop the scope creeping backwards on a HW80, not sure if it makes any difference being a springer air rifle or not, some scope rings had a recess to put a pin in that went into a hole on the rifle to stop it creeping backwards. After experiencing this I was always surprised that almost everyone said push the scope forward then tighten

Yes it does make a difference. A springer is the exception to the rule. Think about what is happening when you pull the trigger.